Message: have a 99 5.2litre went to 180 thermostat and 3923 autolights ran great except kept setting of service engine light code said engine running to cold.went back to 195 thermo and bosh plugs runs like crap.if i go back to the autolites with the same 195 thermo will this help smooth out idle or do i need to go back to 180 thermo thanks bigen
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Subject: plugs an thermostat